Why does my Porsche 928 engine not start?
If the starter en gages and cranks the engine, faulty wiring to the starter is likely the cause. If the engine does not crank, the starter solenoid is the culprit and should be replaced. Figure 3. 928 fuse panel, varies by model. Figure 4. Starter solenoid connections for testing.
Is the 1986 Porsche 928S a good car?
My 1986 928S was just brought over from Colorado to Florida. The PPI was good, the seller said it was running great in COLORADO. It starts ok, but after a few minutes it start to idle erratic and almost dies, then it drives like it is pulling a boat. After it stalls, it is very hard to start, but eventually it starts after 5 minutes.
Do you need routine maintenance on a Porsche 928?
Like any car, the 928 has its own unique quirks. However, these are very reliable cars for their age and type. To avoid costly repairs down the road, routine maintenance is required. We’ll cover both in our guide and help keep you on the road longer and more reliably.
What does idle stabilizer do on Porsche 928 S4?
The unit in question, which goes by a number of aliases (idle stabilizer, rotary idle actuator, idle speed actuator), is the ECU-controlled servo that controls the idle speed on S4 – up cars. It does this by regulating the flow of air from a fitting before the throttle to a fitting on the intake manifold after the throttle.
What to do if your Porsche 928 won’t start?
If the battery is in good condition and is fully charged, proceed to Step 2. If you your battery is in good condition and is fully charged but your 928 will still not crank, the starter solenoid is not being energized. The starter circuit includes the ignition switch, starter relay, starter solenoid, and wiring between these devices.
What should battery voltage be on Porsche 928?
With the key in the “ON” position, you can read the battery voltage on the dash instrument cluster. A normal reading for a healthy battery should show just about 12 volts on the gauge. Anything less than 12 volts indicates the battery voltage is low, and the red light warning light on the voltage gauge will illuminate.
What causes thrust bearing to fail on Porsche 928?
Thrust Bearing Failure. One of the most common issues Porsche 928 owners report is failure of the engine thrust bearing in automatic transmission equipped cars. There are many theories regarding why this part experiences common failure, but in general, the driveshaft puts excessive pressure on the flywheel and drive plate,…
When to replace timing belt on Porsche 928?
If all else fails in an attempt to start your 928, check for timing belt failure. The factory-recommended replacement of the timing belt is 60,000 miles or every four years. This important belt can often go unserviced and has the potential to fail. If the timing belt breaks, the camshafts will not turn]
If the starter en gages and cranks the engine, faulty wiring to the starter is likely the cause. If the engine does not crank, the starter solenoid is the culprit and should be replaced. Figure 3. 928 fuse panel, varies by model. Figure 4. Starter solenoid connections for testing.
Where are the ground wires on a Porsche 928?
One is at the top of the “O” in the word Porsche cast into the cam cover — and it may be covered-up by the emissions air injection valve/hose. The second attachment point on the cam cover is more visible and is closer to front of car. Point 10 For later Euro cars, look for ground wires attached to the back of cam gear metal rear covers.
Where is the injector harness on a Porsche 928?
They ground the engine electronics & the injector harness. One is at the top of the “O” in the word Porsche cast into the cam cover — and it may be covered-up by the emissions air injection valve/hose. The second attachment point on the cam cover is more visible and is closer to front of car.
What causes a car to start hot on 4 cylinders?
If the injector is not seating properly due to dirt or wear, it will allow fuel to dribble into the cylinder, wetting the lug and more importantly reducing the holding pressure. This can cause various hot starting problems, mainly starting on 4 or 5 cylinders, then clearing after a rev.
Why is my car engine hard to start?
The starter itself may not be cranking correctly due to the heat impacting the relays which drive the mechanisms (this was a common issue in old air cooled VWs, and with how some newer engines are crammed into engine bays similar things can happen).
Where is the start valve on a Porsche 911?
The Start Valve is located on back of intake manifold below the venturi assembly. The Thermo-time Switch is located on engine block below the secondary air pump. Warm-up Regulator (1) Electric Fuel Pump K-Jetronic Fuel Pump Test Point (arrow) Secondary Air Pump Pressure Hose (arrow) Porsche 911T, 911,911S through model 1975
Why is a hot engine hard to start?
Most of the reasons by which a hot engine would be hard to start are based on problems related to the fuel. When the engine is too hot, fuel can’t circulate properly due to the way in which vapor obstructs it and therefore the engine wouldn’t start as easily as it should or it wouldn’t start at all. Continue reading below Our Video of the Day